Speaker :
 Professor HsinYuan Huang (National Taiwan University) 
Title :

On the ActionMinimizing Triple Collision Orbits in the Planar Threebody Problem 
Time :
 20120301 (Thu) 14:00  15:00 
Place : 
Lecture Hall, Inst. of Mathematics 
Abstract: 
In this talk, we study the shape of the limiting configuration of the actionminimizing triple collision orbits in the planar Newtonian threebody problem with arbitrary masses. For a given noncollinear initial configuration, the minimizing triple collision orbit is collisionfree until a simultaneous collision, and its limiting configuration is the Lagrangian configuration with the same orientation as the initial configuration. For the collinear initial configuration, under a certain technical assumption, there exist two minimizing orbits. The limiting configurations of these orbits are the
two opposite Lagrangian configurations. 